Free Shipping Offers are for Standard Ground Delivery service and are only valid for shipping addresses within the 48 Contiguous United States. Truck freight and oversize charges still apply unless otherwise notes and can only be shipped to the lower 48 States.Same Day Shipping (on most parts) if you order by 5PM EST on a business day. We ship via UPS Ground and/or USPS to all locations in the Continental 48 States.

Product Resources

Optimize Performance. Get the performance boost you crave for your GT Mustang while staying EPA friendly with a Kooks Green Catted X-Pipe. Designed for use with Kooks Long Tube Headers, this X-pipe features two Kooks Ultra High Performance Green Catalyst Converters for less restriction. Without robbing horsepower, the EPA-compliant system works on applications up to 800hp and handles exhaust temperatures as high as 1500F.

Race Car Growl. The Kooks X-Pipe not only increases the power of your Mustang, but it also changes its sound as well. The modern X crossover design of this Kooks Mid Pipe will add a loud raspy, race car style growl to the sound of your exhaust. While being louder than stock, the sound is not overbearing or obnoxious.

Green Catalytic Converters. GreenCats are Kooks ultra high performance green catalytic converters. Kooks specifically designed these Catalytic Converters to meet stringent EPA Federal Emissions Standards. Able to handle exhaust temperatures of up to 1500F, these GreenCats work exceptionally well on both force inducted and naturally aspirated Mustangs. GreenCats have a 90% success rate of eliminating emission related "Check Engine Light" issues.

Application. This Kooks Shorty Green Catted X-Pipe is specifically designed to fit the 2011-2014 5.0L GT Mustangs with Kooks Long-Tube Headers installed. The 3" step down to a 2.75" outlet allows for use of the OEM catback exhaust system.

Technical Note. This product is not legal for use in California or any other state adopting California emission standards. Not legal for use on pollution controlled motor vehicles; intended for off road use only.

1 Questions / 1 Answers

This will fit with the Borla ATAK catback exhaust however since the Borla ATAK has an X-Pipe assembly that comes with the catback as well as the size of the pipe being 2.75" instead of the 3" of the Kooks Green Catted X-Pipe, some modification will be required.

Kooks Green Catted X-Pipe (11-14 GT w/ Long Tube Headers)

Is this image helpful?

Thanks for your input!

Word on The Street

This is the 3rd or 4th time I've ordered from American Muscle and I can't say anything bad about them. Their service is prompt, the quality of their products is excellent and their website is very easy to navigate. We have a 2007 Mustang GT and so far I've ordered everything for it from American Muscle, they have an awesome variety to choose from. I highly recommend it to anyone, you won't be sorry.

Meet Our Team

For as long I can remember cars were my life. I always had a case of Hot Wheels with me, I would spend hours playing with them and then hours polishing and dusting them off, checking for any scratches. All my life my father would always tell stories about his 1968 Black Mustang that he purchased new...